Toothbrush



FIG. 1 is a top, right hand side perspective view of a toothbrush showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a right hand side elevational view thereof;

FIG. 4 is a bottom, left hand side perspective view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a left hand side elevational view thereof. 

The ornamental design for a toothbrush, as shown. 